Defensive publication

ABSTRACT

THE DISCLOSURE CONCERNS AN INTEGRATED PROCESS FOR PREPARING OLEFINS WHEREIN IN THE PROCESS INCLUDES A DIMERIZATION STEP IN CONJUNCTION WITH THE CONVENTIONAL &#39;&#39;&#39;&#39;ONE-STEP&#39;&#39;&#39;&#39; OR SEQUENTIAL PROCESSES OF PREPARING LINEAR OLEFINS, WHEREIN THE INTERMEDIATE WEIGHT OLEFINS ARE RECYCLED TO THE DIMERIZATION STEP. THE PROCESS SERVES TO INCREASE THE AMOUNT OF HIGH MOLECULAR WEIGHT (I.E.,C12+) OLEFINS. ADVANTAGES OF THE INTEGRATED PROCESS ARE CATALYST SHARING AND AN IMPROVEMENT IN PRODUCT DISTRIBUTION (INCREASING THE AMOUNT OF HIGHER OLEFINS AND DECREASING THE AMOUNT OF LOWER OLEFINS). A PARTICULAR ADVANTAGES OF THE INTEGRATED SEQUENTIAL-DIMERIZATION PROCESS IS THE USE OF C6-C10 ALUMINUM TRIALKYLS AS THE CATALYST IN THE DEMERIZATION STEP. THESE C6-C10 ALIMINUM TRIALKYLS CAN BE REMOVED AND RECYCLED TO THE GROWTH REACTOR. THE OVERALL RESULT IS REDUCED FORMATION TRIMERS IN THE DIEMRIZATION STEP AND A PRONOUNCED SYNERGISM IN THE AMOUNT OF C6-C10 OLEFINS PRODUCED FROM THE INTEGRATED PROCESS.

DEFENSIVE PUBLICATION UNITED STATES PATENT AND TRADEMARK OFFICEPublished at the request of the applicant or-owner in accordance withthe Notice of Dec. 16, 1969, 869 O.G 687. The abstracts of DefensivePublication applications are identified by distinctly numbered seriesand are arranged chronologically. The heading of each abstract indicatesthe number of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent and Trademark Office makes noassertion as to the novelty of the disclosed subject matter.

PUBLISHED SEPTEMBER 2, 1975 T938,012 PREPARATION OF oLEFrNs Gaylord G.Greenfield, Montvillc, N.J., and Ralph T.

Ferrell, Norman, 0kia., assignors to Continental Oil Company, PoncaCity, Okla.

Filed Sept. 26, 1974, Ser. No. 509,575 Int. Cl. C07c 3/10 US. Cl.260--683.15 D No Drawing. 11 Pages Specification This disclosureconcerns an integrated process for preparing olefins wherein the processincludes a dimerization step in conjunction with the conventionalone-step" or sequential processes of preparing linear olefins, whereinthe intermediate Weight olefins are recycled to the dimerizatlon step.The process serves to increase the amount of high molecular weight(i.e., C olefins. Advantages of the integrated process are catalystsharing and an improvement in product distribution (increasing theamount of higher olefins and decreasing the amount of lower olefins). Aparticular advantage of the integrated sequential-dimerization processis the use of C C aluminum trialkyls as the catalyst in the dimerizationstep. These C -C aluminum trialkyls can be recovered and recycled to thegrowth reactor. The overall result is reduced formation of trimers inthe dimerization step and a pronounced synergism in the amount of C -Colefins produced from the integrated process.

